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Proceedings Paper

The time-shift technique for measurement size of non-transparent spherical particles
Author(s): Walter Schäfer; Cameron Tropea
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Paper Abstract

In this study we introduce the time-shift technique, also known as the pulsed-displacement technique, as a means of measuring size and velocity of spherical particles. The measurement technique is not new, it has been introduced by Semidetnov[1] in 1985 and more generally discussed by Hess and Wood[2], Lin et al[3], Damaschke et al.[4] and Albrecht et al[5]. The novelty introduced in this study is the application of the technique to measure non-transparent particles, which are quite common for example in spray drying processes or in paint sprays. In this contribution the basic working principle of the time-shift technique will be reviewed and an optical configuration suitable for the measurement of non-transparent droplets will be presented. The signal generation and processing will be discussed. Example measurements in a milk spray are presented.

Paper Details

Date Published: 6 August 2014
PDF: 5 pages
Proc. SPIE 9232, International Conference on Optical Particle Characterization (OPC 2014), 92320H (6 August 2014); doi: 10.1117/12.2063342
Show Author Affiliations
Walter Schäfer, Technische Univ. Darmstadt (Germany)
AOM-Systems GmbH (Germany)
Cameron Tropea, Technische Univ. Darmstadt (Germany)
AOM-Systems GmbH (Germany)

Published in SPIE Proceedings Vol. 9232:
International Conference on Optical Particle Characterization (OPC 2014)
Nobuhiro Aya; Norihiko Iki; Tsutomu Shimura; Tomohiro Shirai, Editor(s)

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